package collection;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;

/**
 * 对Point集合进行排序
 */
public class SortPoint {
    public static void main(String[] args) {
        List<Point> list = new ArrayList<>();
        list.add(new Point(5,8));
        list.add(new Point(33,290));
        list.add(new Point(21,52));
        list.add(new Point(45,6));
        list.add(new Point(55,69));
        list.add(new Point(1,2));
        System.out.println("list的原始数据："+list);//list的原始数据：[(5,8), (33,290), (21,52), (45,6), (55,69), (1,2)]

        Collections.sort(list, new Comparator<Point>() {
            @Override
            public int compare(Point o1, Point o2) {
                return o1.getX()-o2.getX();//按对象的x属性升序:list排序后数据：[(1,2), (5,8), (21,52), (33,290), (45,6), (55,69)]
                //return o2.getY()-o1.getY();//按对象的y属性降序：list排序后数据：[(33,290), (55,69), (21,52), (5,8), (45,6), (1,2)]
            }
        });
        System.out.println("list排序后数据："+list);
    }
}
